feature(keyringctl): add option to filter listing by trust

libkeyringctl/cli.py

@@ -15,6 +15,7 @@ from .keyring import convert
 from .keyring import export
 from .keyring import inspect_keyring
 from .keyring import list_keyring
+from .types import TrustFilter
 from .util import absolute_path
 from .util import cwd
 from .verify import verify
@@ -81,6 +82,12 @@ list_parser = subcommands.add_parser(
     help="list the certificates in the keyring",
 )
 list_parser.add_argument("--main", action="store_true", help="List main signing keys instead of packager keys")
+list_parser.add_argument(
+    "--trust",
+    choices=[e.value for e in TrustFilter],
+    default=TrustFilter.all.value,
+    help="Filter the list based on trust",
+)
 list_parser.add_argument(
     "source",
     nargs="*",
@@ -180,10 +187,12 @@ def main() -> None:  # noqa: ignore=C901
                     target_dir=keyring_root.parent / "build",
                 )
             elif "list" == args.subcommand:
+                trust_filter = TrustFilter[args.trust]
                 list_keyring(
                     keyring_root=keyring_root,
                     sources=args.source,
                     main_keys=args.main,
+                    trust_filter=trust_filter,
                 )
             elif "inspect" == args.subcommand:
                 print(

libkeyringctl/keyring.py

@@ -25,9 +25,11 @@ from .sequoia import packet_signature_creation_time
 from .sequoia import packet_split
 from .trust import certificate_trust
 from .trust import certificate_trust_from_paths
+from .trust import filter_by_trust
 from .trust import format_trust_label
 from .types import Fingerprint
 from .types import Trust
+from .types import TrustFilter
 from .types import Uid
 from .types import Username
 from .util import contains_fingerprint
@@ -1097,7 +1099,12 @@ def build(
     )
 
 
-def list_keyring(keyring_root: Path, sources: Optional[List[Path]] = None, main_keys: bool = False) -> None:
+def list_keyring(
+    keyring_root: Path,
+    sources: Optional[List[Path]] = None,
+    main_keys: bool = False,
+    trust_filter: TrustFilter = TrustFilter.all,
+) -> None:
     """List certificates in the keyring
 
     If sources contains directories, all certificate below them are considered.
@@ -1108,6 +1115,7 @@ def list_keyring(keyring_root: Path, sources: Optional[List[Path]] = None, main_
     sources: A list of username, fingerprint or directories from which to read PGP packet information
         (defaults to `keyring_root`)
     main_keys: List main keys instead of packager keys (defaults to False)
+    trust_filter: Filter the listing based on trust
     """
 
     keyring_dir = keyring_root / ("main" if main_keys else "packager")
@@ -1130,6 +1138,8 @@ def list_keyring(keyring_root: Path, sources: Optional[List[Path]] = None, main_
             main_keys=get_fingerprints_from_paths([keyring_root / "main"]),
             all_fingerprints=get_fingerprints_from_paths([keyring_root]),
         )
+        if not filter_by_trust(trust=trust, trust_filter=trust_filter):
+            continue
         trust_label = format_trust_label(trust=trust)
         print(f"{username:<{username_length}} {certificate.name} {trust_label}")
 

libkeyringctl/trust.py

@@ -10,6 +10,7 @@ from typing import Set
 from .types import Color
 from .types import Fingerprint
 from .types import Trust
+from .types import TrustFilter
 from .types import Uid
 from .util import contains_fingerprint
 from .util import get_cert_paths
@@ -236,3 +237,26 @@ def format_trust_label(trust: Trust) -> str:
     Text label representing the trust status as literal and icon with colors
     """
     return f"{trust_color(trust).value}{trust_icon(trust)} {trust.name}{Color.RST.value}"
+
+
+def filter_by_trust(trust: Trust, trust_filter: TrustFilter) -> bool:
+    """Filters a trust by a given filter and returns true if within the rules
+
+    Parameters
+    ----------
+    trust: Trust to check for being filtered
+    trust_filter: Filter rules to check the trust against
+
+    Returns
+    -------
+    True if the given trust is within the filter rules
+    """
+    trust_map = {
+        TrustFilter.unknown: [Trust.unknown],
+        TrustFilter.marginal: [Trust.marginal],
+        TrustFilter.full: [Trust.full],
+        TrustFilter.revoked: [Trust.revoked],
+        TrustFilter.unrevoked: [Trust.unknown, Trust.marginal, Trust.full],
+        TrustFilter.all: [Trust.revoked, Trust.unknown, Trust.marginal, Trust.full],
+    }
+    return trust in trust_map[trust_filter]

libkeyringctl/types.py

@@ -17,6 +17,15 @@ class Trust(Enum):
     full = auto()
 
 
+class TrustFilter(Enum):
+    unknown = "unknown"
+    revoked = "revoked"
+    marginal = "marginal"
+    full = "full"
+    unrevoked = "unrevoked"
+    all = "all"
+
+
 TRUST_MAX_LENGTH: int = max([len(e.name) for e in Trust])